I think it's Petrov, but it might've transposed to three knights in the current position, I am very rusty myself. Google it, I say!

_/|\_

PS In (serious) response to your earlier question, I don't think have a rating anymore. I used to play a fair bit and played two or three tournaments but the last one was over 10 years ago. Since then I have probably played less than half a dozen games in total.